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https://www.readbyqxmd.com/read/28431845/infection-prevention-and-control-and-the-refugee-population-experiences-from-the-university-of-louisville-global-health-center
#1
Ruth M Carrico, Linda Goss, Timothy L Wiemken, Rahel S Bosson, Paula Peyrani, William A Mattingly, Allison Pauly, Rebecca A Ford, Stanley Kotey, Julio A Ramirez
BACKGROUND: During 2016, approximately 140,000 individuals entered the United States as part of the federal government refugee resettlement program and established themselves in communities in virtually every state. No national database regarding refugee health currently exists; therefore, little is known about existing infectious diseases, conditions, and cultural practices that impact successful acculturation. The objective of this report is to identify what is currently known about refugees and circumstances important to infection prevention and control with respect to their roles as new community members, employees, and consumers of health care...
April 18, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28430824/suppressors-of-cytokine-signaling-in-tuberculosis
#2
Shih-Wei Lee, Chi-Wei Liu, Jia-Ying Hu, Li-Mei Chiang, Chih-Pin Chuu, Lawrence Shih-Hsin Wu, Yung-Hsi Kao
Tuberculosis (TB), a global disease mainly infected by Mycobacterium tuberculosis, remains leading public health problem worldwide. Suppressors of cytokine signaling (SOCSs) play important roles in the protection against microbial infection. However, the relationship between members of the SOCS family and tuberculosis infection remains unclear. Using peripheral blood mononuclear cells, we investigated the mRNA expression profiles of SOCS subfamilies among active TB, latent tuberculosis infection (LTBI), and healthy individuals...
2017: PloS One
https://www.readbyqxmd.com/read/28429162/involvement-of-methylated-hbha-expressed-from-mycobacterium-smegmatis-in-an-ifn-%C3%AE-release-assay-to-aid-discrimination-between-latent-infection-and-active-tuberculosis-in-bcg-vaccinated-populations
#3
H-L Wen, C-L Li, G Li, Y-H Lu, H-C Li, T Li, H-M Zhao, K Wu, D B Lowrie, J-X Lv, S-H Lu, X-Y Fan
IFN-γ release assays (IGRAs) based on region of difference 1 (RD1) antigens have improved diagnosis of Mycobacterium tuberculosis (M. tb) infection. However, IGRAs with these antigens cannot discriminate between active tuberculosis (ATB) and latent tuberculosis infection (LTBI). M. tb heparin-binding-hemagglutinin (HBHA) induces relatively high IFN-γ responses in LTBI individuals and low responses in ATB patients, but purification of the native methylated HBHA from cultures of M. tb for immunological tests is complex and time-consuming...
April 20, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28428627/glucocorticoids-suppress-antimicrobial-autophagy-and-nitric-oxide-production-and-facilitate-mycobacterial-survival-in-macrophages
#4
Jinli Wang, Ruining Wang, Hui Wang, Xiaofan Yang, Jiahui Yang, Wenjing Xiong, Qian Wen, Li Ma
Chronic administration of glucocorticoids has been shown to render individuals highly susceptible to mycobacterial infection and lead to reactivation of latent bacilli. However, the effect of glucocorticoids on innate anti-mycobacterial defense, especially in macrophages remains largely unknown. Here, we found that glucocorticoids inhibited the innate immune response, antimicrobial nitric oxide production and autophagy in mycobacteria-challenged macrophages. Meanwhile, maturation and acidification of mycobacterial phagosomes were attenuated in RAW264...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28425350/metabolomics-approach-discriminates-toxicity-index-of-pyrazinamide-and-its-metabolic-products-pyrazinoic-acid-and-5-hydroxy-pyrazinoic-acid
#5
A Rawat, S Chaturvedi, A K Singh, A Guleria, D Dubey, A K Keshari, V Raj, A Rai, A Prakash, U Kumar, D Kumar, S Saha
Pyrazinamide (PYZ)-an essential component of primary drug regimen used for the treatment and management of multidrug resistant or latent tuberculosis-is well known for its hepatoxicity. However, the mechanism of PYZ-induced hepatotoxicity is still unknown to researchers. Studies have shown that the drug is metabolized in the liver to pyrazinoic acid (PA) and 5-hydroxy pyrazinoic acid (5-OHPA) which individually may cause different degrees of hepatotoxicity. To evaluate this hypothesis, PYZ, PA, and 5-OHPA were administered to albino Wistar rats orally (respectively, at 250, 125, and 125 mg kg(-1) for 28 days)...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28424703/immune-responses-to-bacillus-calmette-gu%C3%A3-rin-vaccination-why-do-they-fail-to-protect-against-mycobacterium-tuberculosis
#6
REVIEW
Juan I Moliva, Joanne Turner, Jordi B Torrelles
Mycobacterium tuberculosis (M.tb), the causative agent of tuberculosis (TB), is the current leading cause of death due to a single infectious organism. Although curable, the broad emergence of multi-, extensive-, extreme-, and total-drug resistant strains of M.tb has hindered eradication efforts of this pathogen. Furthermore, computational models predict a quarter of the world's population is infected with M.tb in a latent state, effectively serving as the largest reservoir for any human pathogen with the ability to cause significant morbidity and mortality...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28417858/-18-f-fdg-pet-ct-imaging-of-thoracic-and-extrathoracic-tuberculosis-in-children
#7
REVIEW
Matthieu Pelletier-Galarneau, Patrick Martineau, Lionel S Zuckier, Xuan Pham, Raymond Lambert, Sophie Turpin
Tuberculosis (TB) remains a major health problem, affecting approximately one-third of the world׳s population. The tubercle bacillus can affect virtually any organ of the human body and if left untreated can lead to severe morbidity and death. Diagnosis of active TB is challenging, especially in children. As a "great imitator," the disease can mimic numerous other pathologies, both clinically and at imaging. Although recognition of active TB is crucial to initiate adequate treatment in a timely fashion, thereby preventing transmission of disease, differentiation of active and quiescent disease is not always straightforward...
May 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28414762/transcriptional-networks-are-associated-with-resistance-to-mycobacterium-tuberculosis-infection
#8
Chetan Seshadri, Nafiseh Sedaghat, Monica Campo, Glenna Peterson, Richard D Wells, Gregory S Olson, David R Sherman, Catherine M Stein, Harriet Mayanja-Kizza, Ali Shojaie, W Henry Boom, Thomas R Hawn
RATIONALE: Understanding mechanisms of resistance to M. tuberculosis (M.tb) infection in humans could identify novel therapeutic strategies as it has for other infectious diseases, such as HIV. OBJECTIVES: To compare the early transcriptional response of M.tb-infected monocytes between Ugandan household contacts of tuberculosis patients who demonstrate clinical resistance to M.tb infection (cases) and matched controls with latent tuberculosis infection. METHODS: Cases (n = 10) and controls (n = 18) were selected from a long-term household contact study in which cases did not convert their tuberculin skin test (TST) or develop tuberculosis over two years of follow up...
2017: PloS One
https://www.readbyqxmd.com/read/28410979/post-migration-follow-up-of-migrants-identified-to-be-at-increased-risk-of-developing-tuberculosis-at-pre-migration-screening-a-systematic-review-and-meta-analysis
#9
Isaac H Y Chan, Nishta Kaushik, Claudia C Dobler
BACKGROUND: Post-migration follow-up of migrants considered at increased risk of developing tuberculosis based on pre-migration screening abnormalities (high-risk migrants) is implemented in several low-incidence countries. We aimed to determine the rate of tuberculosis in this population to inform cross-border tuberculosis control policies. METHODS: We searched MEDLINE and Embase (since inception to Jan 12, 2017) for studies evaluating post-migration follow-up of high-risk migrants...
April 11, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28409555/treatment-of-latent-tuberculosis-infection
#10
Connie A Haley
There are approximately 56 million people who harbor Mycobacterium tuberculosis that may progress to active tuberculosis (TB) at some point in their lives. Modeling studies suggest that if only 8% of these individuals with latent TB infection (LTBI) were treated annually, overall global incidence would be 14-fold lower by 2050 compared to incidence in 2013, even in the absence of additional TB control measures. This highlights the importance of identifying and treating latently infected individuals, and that this intervention must be scaled up to achieve the goals of the Global End TB Strategy...
April 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28406884/use-of-video-directly-observed-therapy-for-treatment-of-latent-tuberculosis-infection-johnson-county-kansas-2015
#11
Elizabeth Lawlor Holzschuh, Stacie Province, Krystle Johnson, Caitlin Walls, Cathy Shemwell, Gary Martin, Amy Showalter, Jennifer Dunlay, Andrew Conyers, Phil Griffin, Nancy Tausz
Tuberculosis (TB) is caused by the bacterium Mycobacterium tuberculosis and is spread from person to person through the air. TB can be spread in congregate settings, such as school environments, to varying degrees, based on factors including duration of contact and air ventilation (1); therefore, evaluating potential contacts and exposures can be challenging. In February 2015, a student at a Kansas high school received a diagnosis of active pulmonary TB disease. Screening of 385 (91%) school contacts, four (100%) household contacts, and 19 (90%) social contacts resulted in the identification of 50 persons with latent TB infection...
April 14, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28405483/treatment-results-in-serpiginous-choroiditis-and-multifocal-serpiginoid-choroiditis-associated-with-latent-tuberculosis
#12
Merih Oray, Zaur Zakiev, Tülin Çağatay, İlknur Tuğal-Tutkun
OBJECTIVES: To compare the results of systemic antitubercular therapy (ATT) and immunomodulatory therapy (IMT) in patients with serpiginous choroiditis (SC) or multifocal serpiginoid choroiditis (MSC). MATERIALS AND METHODS: The clinical records of 28 patients with SC and MSC were reviewed. Patients were divided into 2 groups according to the treatment applied. Group 1 included 12 patients with MSC and 5 with SC treated with ATT and corticosteroid (CS); group 2 included 9 patients with MSC and 2 with SC treated with conventional IMT, interferon alpha-2a, and/or CS monotherapy...
April 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28404472/the-prevalence-of-latent-tuberculosis-infection-in-rural-jiangsu-china
#13
Y Liu, S Huang, H Jiang, J Xiong, Y Wang, M Ou, J Cai, C Yang, Z Wang, S Ge, N Xia
OBJECTIVES: Diagnosis and interventional treatment of latent tuberculosis (TB) infection (LTBI) are important components in tuberculosis control. But systematic studies regarding the epidemic of LTBI are still rare in China. The objective of this study was to assess the prevalence and risk factors associated with LTBI based on the results of a domestic TB-specific gamma interferon (IFN-γ) release assay (TB-IGRA) in rural Jiangsu, China. STUDY DESIGN: Cross-sectional study of subjects registered in eight villages in Jiangsu, China...
February 4, 2017: Public Health
https://www.readbyqxmd.com/read/28403762/treatment-of-latent-tuberculosis-infections-in-the-darwin-region
#14
Rowena Boyd, Vanessa Johnston, Belinda Farmer, Vicki L Krause
No abstract text is available yet for this article.
April 17, 2017: Medical Journal of Australia
https://www.readbyqxmd.com/read/28403282/tuberculosis-among-prison-staff-in-rio-grande-do-sul
#15
Caroline Busatto, Luciana de Souza Nunes, Andréia Rosane de Moura Valim, Mariana Soares Valença, Suzane Frantz Krug, Daniela Becker, Manuela Filter Allgayer, Lia Gonçalves Possuelo
OBJECTIVE: to evaluate the risk of infection and illness caused by Mycobacterium tuberculosis among health care and security staff in prisons in two regions of Rio Grande do Sul (RS). METHOD: cross-sectional study involving prison staff. An interview and sputum smear microscopy and culture were performed. Latent infection was evaluated according to the result of the tuberculin test (TT), self-referred. RESULTS: among staff who had a TT, 10 (83...
April 2017: Revista Brasileira de Enfermagem
https://www.readbyqxmd.com/read/28403225/association-of-vitamin-d-deficiency-season-of-the-year-and-latent-tuberculosis-infection-among-household-contacts
#16
María Elvira Balcells, Patricia García, Camila Tiznado, Luis Villarroel, Natalia Scioscia, Camila Carvajal, Francesca Zegna-Ratá, Mariluz Hernández, Paulina Meza, Luis F González, Carlos Peña, Rodrigo Naves
OBJECTIVES: Vitamin D (VD) enhances the immune response against Mycobacterium tuberculosis in vitro, and VD deficiency has been described in patients with active tuberculosis (TB). However, the role of hypovitaminosis D in the pathogenesis of early TB infection acquisition is unclear. We aimed to evaluate the association of VD deficiency, season of the year, and latent TB infection in household contacts (HHC), given that this is a potentially modifiable condition often related to nutritional deficiencies and lack of sun exposure...
2017: PloS One
https://www.readbyqxmd.com/read/28400527/targeting-energy-metabolism-in-mycobacterium-tuberculosis-a-new-paradigm-in-antimycobacterial-drug-discovery
#17
REVIEW
Dirk Bald, Cristina Villellas, Ping Lu, Anil Koul
Drug-resistant mycobacterial infections are a serious global health challenge, leading to high mortality and socioeconomic burdens in developing countries worldwide. New innovative approaches, from identification of new targets to discovery of novel chemical scaffolds, are urgently needed. Recently, energy metabolism in mycobacteria, in particular the oxidative phosphorylation pathway, has emerged as an object of intense microbiological investigation and as a novel target pathway in drug discovery. New classes of antibacterials interfering with elements of the oxidative phosphorylation pathway are highly active in combating dormant or latent mycobacterial infections, with a promise of shortening tuberculosis chemotherapy...
April 11, 2017: MBio
https://www.readbyqxmd.com/read/28399977/acute-kidney-injury-during-treatment-for-latent-tuberculous-infection-with-rifampin
#18
J M Wortham, M Goggin, C Mora, L Vandehey, L Manangan, K M Powell
Treatment for latent tuberculous infection (LTBI) is a key strategy for the elimination of tuberculosis. Rare adverse reactions associated with LTBI treatment have been reported. We report the only case of acute kidney injury reported to Centers for Disease Control and Prevention surveillance for LTBI treatment-related adverse events. The patient experienced rapid intravascular hemolysis, resulting in heme pigment nephropathy; he was hospitalized and received three hemodialysis treatments, but recovered without sequelae...
May 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28399802/efficacy-and-completion-rates-of-rifapentine-and-isoniazid-3hp-compared-to-other-treatment-regimens-for-latent-tuberculosis-infection-a-systematic-review-with-network-meta-analyses
#19
Christopher Pease, Brian Hutton, Fatemeh Yazdi, Dianna Wolfe, Candyce Hamel, Pauline Quach, Becky Skidmore, David Moher, Gonzalo G Alvarez
BACKGROUND: We conducted a systematic review and network meta-analysis (NMA) to examine the efficacy and completion rates of treatments for latent tuberculosis infection (LTBI). While a previous review found newer, short-duration regimens to be effective, several included studies did not confirm LTBI, and analyses did not account for variable follow-up or assess completion. METHODS: We searched MEDLINE, Embase, CENTRAL, PubMed, and additional sources to identify RCTs in patients with confirmed LTBI that involved a regimen of interest and reported on efficacy or completion...
April 11, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28398535/diagnostic-utility-of-new-equation-for-active-tuberculosis-based-on-parameters-of-interferon-%C3%AE-release-assay
#20
You La Jeon, Min-Jeong Kim, Woo-In Lee, Myeong Hee Kim, So Young Kang
Background: We derived a new equation to include interferon-γ (IFN-γ) levels in the QuantiFERON-Gold In-Tube (QFT-GIT) assay to discriminate active tuberculosis (ATB) infection from latent TB, and compared the diagnostic performance of the QFT-GIT assay and the new equation. Methods: From January 2013 through May 2015, we retrospectively enrolled 159 and 408 patients with and without ATB, respectively, in this study. Discriminant analysis was performed to derive an equation to distinguish the ATB group from the non-ATB group...
April 8, 2017: Laboratory Medicine
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